Kotlin Programming: The Big Nerd Ranch Guide, First Edition

Data Classes

Step one in building a world for your hero is to establish a coordinate system to move around on. The coordinate system will use cardinal directions to communicate direction as well as a class to represent change in direction, called Coordinate.

Coordinate is a simple type and a good candidate to be defined as a data class. As the name suggests, data classes are classes designed specifically for holding data, and they come with some powerful data manipulation benefits, as you will see shortly.

Create a new file called Navigation.kt and add Coordinate as a data class, using the data keyword. Coordinate should have three properties:

• x, an Int val defined in the primary constructor for the x coordinate

• y, an Int ...